[" The mean weight of "25" students of a class is "52kg" .If the mean weight of "],[" the first "13" students of the class is "48kg" and that of the last "13" students "],[" is "55kg" ,find the weight of the "13" th student."]

The mean weight of 25 students of a class is 52 kg. if the mean weight of the first 13 student of the class is 48 kg and that of the last 13 students is 55kg , find the weight of the 13th student.

The mean weight of 25 students of a class is 48 kg. If the mean weight of first 13 students is 50 kg and the last 13 students is 46 kg. Find the weight of the 13th students?

The mean weight of 60 students of a class is 52.75 kg. If mean weight of 25 students of this class is 51 kg, find the mean weight (in kg) of remaining 35 students of the class

The mean weight of 60 students of a class is 52.75 kg. If the mean weight of 25 of them is 51 kg., find the mean weight of remaining students.

If the average weight of the students of a class is 15kg, the average weight of the students of another class is 30kg and average weight of the students of both the classes is 25kg, then find the ratio of the number of students of the first class to the another class.

The mean weight of 120 students of a school is 52*75 kg. If the mean weight of 50 of them is 51 kg, find the mean weight of the remaining students.

The mean weight of 120 students of a school is 52*75 kg. If the mean weight of 50 of them is 51 kg, find the mean weight of the remaining students.

The average weigth of 25 students is 16 kg. The average weight of the first 12 students is 14 kg and of the last 12 students is 17 kg . Find the weight of the thirteenth students.

The mean weight of 150 students in a class is 60 kg. the mean weight of boys is 70 kg and that of girls is 55 kg. What is the number of boys in the class?